Muffler.



`HfA.` SCHMIDT- v Mumia. APPLICATION FRED `PR. 23, 191?. RENEWED JUNE20| 1918.

(g1/we wko@ im m@ UNITED STATES HERMA-.N A. SCHMIDT, 01T' DETROIT,MCHGPM'.

MUFrLnn.

Specification of Letters Patent.

Patented Aug. 6, 1.918.

Application led April 23. 1917, Serial No. 163,861. Renewed .Tune 20,1918. SerialNo. 2li-1,0134.-

To all whom t may concern:

Be it known that l, HERMAN A, SCHMIDT, a citizen of the-United States ofAmerica, residing at Detroit, in the county oir l/Vayne and State oflllichigan, have invented certain new and useful Improvements inMuftiers, ot' which the following is a specification, reference beinghad therein to the `accompanying drawings.

rlhis invention relates to mufilers especially designed for the exhaustor manifold of an internal combustion engine, although the device may beused for silencing the exhaust of steam or gases from conduits.

',lhe primary obje-ct of my invention is to provide a muffler having aseries of spaced 'mailling members which will retard and positivelyreduce to atmospheric pressure, gases passing therethrough, Withoutoverheating of the device or clogging thereof duc to deposits fromexhaust gases.

A further object; or' my invention is to provide a mailling devicewherein the` parts are constructed with a view oil reducing the cost ofmanufacture and at the same time retain those features by whichdurability, simplicity oi' construction and ease of asembling aresecured.

Reference Will now be had to the drawing, wherein`- Y Figure 1 is alongitudinal sectional view of the muffler, and

Figs. 2 to 5 inclusive are views in elevation ot detached baillemembers.

ln the drawing, 1 and 2 denote inner and outer cylindrical shells of thesame length and material, the inner vshell 1 being disposed inconcentric spaced relation to the Oute'r shell 2 to provide an annularlair space 3, also clearance for a cover l on'the inner shell 1, saidcover being preferably made of asbestos, which together with the airspace 3 will tend to deaden any sound Within the muiller and at the sametime prevent overheating of the outershell.

Engaging the ends of the inner and outer shells 1 and 2 respectively,are caps 5 and 6 connected by a plurality of tie rods 7 having heads 8at the cap 5 and detachable nuts 9 at the cap 6. The cap 6 has aconcentric connection 10 'for an inlet pipe 11, and the cap 5 has anoil'set outlet connection or eX- haast 12, which is provided with ailattened or restricted portion 13.

Arranged on the tie rods 7 and mainnated 15, 1G, 17, 18, 19, 2O and 21.Thebaille member 21 is in proximity to the inlet pipell and .servesfunctionally as a deilec.

tor, said member being conical shaped so .that gases entering the innershell 1 will be deflected toward the Walls thereof orthe edges of saidbaille member, which are in spaced relation to the inner shell 1.

The baille members 20 and 15 are identical in construction and one ofthese members is shown in Fig. 2 in the 4form of a disk having parallelslots 22. The baille members 20 and 15 engage the Walls of the innershell 1 and it is necessary for gases to pass through the slots 22. Thebaille member 20 may be positioned relative to the baille member 15 sothat the slots 22 of the member 20 are at right angles to the slots ofthe baiile member 15.

The baille members 19 and 17 are identical in construction and one ofthese members is shown in Fig. t consisting Aof a plate substantiallyrectangular and having shell contacting edges 23 and other edges 24coperating with the inner shell in providing openings adjacent saidshell, through Which gasesY must pass.

The baille members 16 and 18 are identical in construction and have beenshown in Figs. 3 and 5 respectively. These baille members are in theform oi"v disks having a series of parallel slots 25 and when placingsaid baille members in position, the baille member 18 has the slotsthereof at right angles to the slots of the baille member 16.

'The course of gases through the muiller has been indicated by arrowsand it Will be 'noted that the gases are sufficiently retarded so as tobe reduced to atmospheric pressure before final exhaust, consequentlyall noise is eliminated or silenced` by the device.

l attach considerable importance to the manner of assembling the variousbaille members, as in some instances the number of members may bedecreased While in other instances the number of members may vbeincreased by using short or longer spacing sleeves on the tie rods. Itis therefore possible to adapt the muiller to various kinds ofcxhausts,so that irrespective of the in 'tensity or pressure of the exhaust itwill be possible to silence the same. Furthermore, the manner ofassembling the various parts .permits of the mutiler being cleansed fromtime to time and the simple construction reduces the cost of manufactureto a minimum.

One embodiment of my invention has been illustrated, but it is to beunderstood that the structural elements are susceptible to suchvariations and modifications as fall within the scope of the appendedclaim.

A mulling device Comprising an outer cylindrical shell, an innercylindrical shell in. spaced relation to said outer shell, caps on theends of said shells, gas inlet and exhaust connections for said caps,tie rodsextending through said inner shell and oonnecting said cap,baflie members on said rods and in spaced relation, one of said battlemembers being vconical and pointed toward the gas inlet connections andhaving its edges spaced from said inner shell, two of said bafflemembers having a pair of slots with said members positioned with theslots of one member parallel with the slots of -the other member and theedges of both of said members engaging said inner shell, two more ofsaid baffle members having each a plurality of slots with one of saidmembers positioned with the slots thereof at right angles to the slotsot' the other member, and the edges of said members in engagement withsaid inner shell, and the remaining two ot' said baffle .members beingimperforate and substantially rectangular with shell contacting edges,the arrangement ot' the battle `members being such that the slots offour ol said members cooperate with the edges ot the impert'oratemembers, the eoneal member and the inner shell in forming a tortuouspassage for gas through the inner shell.

In testimony whereof I alix my signature in the presence of twowitnesses.

HERMAN A. SCHMIDT.

Witnesses:

LEWIS E. FLANDERS, ANNA M. Donn.

